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Finding the Fourth Proportional to 559.69, 839.57 and 317.77

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Solution

The fourth proportional to 559.69, 839.57 and 317.77 is: 476.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.69 : 839.57 = 317.77 : x
  2. Step 2: Convert to fraction form
    559.69/839.57 = 317.77/x
  3. Step 3: Cross multiply
    559.69x = 839.57 × 317.77
  4. Step 4: Simplify right side
    559.69x = 266,786.47
  5. Step 5: Solve for x
    x = 266,786.47/559.69
  6. Step 6: Final answer
    x = 476.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.